Groundwater Resource Monitoring

Groundwater Resource Evaluation, Monitoring, and Management

Baseline has been assisting clients with groundwater resource evaluation, monitoring, and management for many years. Baseline has extensive experience in monitoring effects to groundwater resources resulting from major dewatering projects and evaluation of groundwater levels and quality to support use of groundwater for municipal and domestic water supply.  Some representative projects are described in more detail below:

San Francisco Public Utilities Commission – New Irvington Tunnel Project

Dewatering for construction of a new 3-mile long Hetch Hetchy system water supply tunnel lowered regional groundwater levels in the Sunol Valley and dried up nearby wells and springs - the only water supply for the overlying rural residences and ranches. Baseline worked closely with the SFPUC and affected property owners to implement a Groundwater Management Program to ensure that they had a continuous supply of water both during and after tunnel construction.

San Francisco Public Utilities Commission – Groundwater Storage and Recovery Project, Westside Basin Groundwater Monitoring

Baseline managed the groundwater monitoring (field monitoring and data analysis) in San Francisco’s Westside Basin for several years to support the SFPUC’s plan to supplement municipal water supplies with groundwater as part of the Groundwater Storage and Recovery Project.  The monitoring network includes over 35 wells spread over two counties.  Baseline managed the field sampling, which included refitting all wells with dedicated sampling equipment and

compiled all the groundwater level and groundwater quality data.  Baseline also managed and maintained all of the monitoring  equipment and developed instructional user guides and protocols for newer SFPUC  employees to use to learn to maintain the systems themselves. 

Water Supply for Cannabis Operations

Baseline has successfully assisted cannabis growers located in water scarce areas to identify innovative water supply sources that are accepted by permitting agencies.  Procuring water supply for a new grow can be a stumbling block that will hold up a new permit. We have developed numerous conceptual designs for rainwater catchment systems that collect rainfall from rooftops and/or site hardscape and collect it in on-site tanks or ponds. This approach does not draw down local groundwater levels as water supply from a well would. Permitting agencies and regulators typically welcome and encourage this approach. These conceptual designs are usually all it takes to get through the permitting process.